I must be slow. You have a usb cable plugged into your iPad (through the camera connection kit I guess) and it's tethering that way? How's it showing the connection? Wifi?
He is using his iMac on wifi coming from his iphone. No discussion of iPad but the process would be the same. Start MyWi with internet tethering on your phone, then look for the SSID on your iPad. Just as if you were going into Starbux with your iPad and looking for a wifi connection.